Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc5746818bc9fb08…

MALICIOUS

PDF

47.8 KB Created: 2020-10-15 16:28:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 6a9f7eabe4e7b0d6e9125ade4d3d9e0b SHA-1: 7c62b7bab6e8718503ee2ea3c573f26831078839 SHA-256: fc5746818bc9fb0858c309aab591317cd87a5609ad32120397f96ade70a86bee
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ggtraff.ru/123?keyword=online+free+powerpoint+to+pdf+converter In PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/9b53ec72f.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/vifotatilaw.pdfIn PDF document text
    • https://kagilovudugavap.weebly.com/uploads/1/3/1/1/131164538/4664983.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/ninix-jakofa-rekano.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/bubutowunaj.pdfIn PDF document text
    • https://site-1037891.mozfiles.com/files/1037891/75137571450.pdfIn PDF document text
    • https://site-1041922.mozfiles.com/files/1041922/sezugalerasamusaxekavu.pdfIn PDF document text
    • https://site-1038777.mozfiles.com/files/1038777/jozuw.pdfIn PDF document text
    • https://site-1037191.mozfiles.com/files/1037191/vufexakutenexuburim.pdfIn PDF document text
    • https://site-1039355.mozfiles.com/files/1039355/39008763356.pdfIn PDF document text
    • https://jedarixires.weebly.com/uploads/1/3/0/9/130969076/7069695.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/beparinunij.pdfIn PDF document text
    • https://lasajiboz.weebly.com/uploads/1/3/1/3/131379041/goxovunixaliba_zilege.pdfIn PDF document text
    • https://nepufetok.weebly.com/uploads/1/3/1/4/131438640/0e5b14e0b7a96.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/2613559.pdfIn PDF document text
    • https://kasukironumasex.weebly.com/uploads/1/3/1/4/131454791/1616827.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/cortland_elementary_school_lunch_menu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4939/7657/files/the_way_to_rainy_mountain_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5618/5000/files/8034580272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9105/8083/files/where_to_find_lead_in_subnautica_below_zero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e67e272-ae5f-4671-b103-98f766f19eff/82271370552.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfb9c63a-9313-486c-b367-cc1a78170d4b/67964351508.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000702f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x702F 4728 bytes
SHA-256: 49beddda8e011b69347183e5af3eb400219782f10b3a01128438625d53fedaff
font_01_sfnt_off00008065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8065 10212 bytes
SHA-256: 26f9b22ed2df9e35411d5462c8cd68e21606969e0f75dcc5234929adbab58104
font_02_sfnt_off0000a35f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA35F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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